package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {


    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /*
     *
     * 添加菜品和口味*/
    @Override
    @Transactional//事务管理
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //向菜品表插入一条数据
        dishMapper.insert(dish);

        //获取insert语句生成的主键值
        Long dishId = dish.getId();

        //向口味表插入数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size()!=0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);

            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);

        }
    }

    /*
     *
     * 菜品分页查询*/

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {

        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);


        return new PageResult(page.getTotal(),page.getResult());
    }

    /*
     *
     * 菜品批量删除*/
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除--是否起售
        for (Long id : ids) {
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                //当前菜品起售中,不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);

            }
        }
        //判断当前菜品是否能够删除--是否关联套餐
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);

        if (setmealIds!=null &&setmealIds.size()>0){
            //当前菜品关联了套餐,不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品

//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除菜品关联的口味
//            dishFlavorMapper.deleteByDishId(id);
//        }

        //根据菜品id集合批量删除菜品
        dishMapper.deleteByIds(ids);

        //根据菜品id集合批量删除菜品口味
        dishFlavorMapper.deleteByDishIds(ids);


    }
/*
* 根据id查询菜品和口味*/
    @Override
    public DishVO getByIdWithFlavor(Long id) {

        //根据id查菜品
        Dish dish = dishMapper.getById(id);
        //根据dishId查询口味
       List<DishFlavor> dishFlavors= dishFlavorMapper.getByDishId(id);
       //将数据封装到VO中去
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /*
    * 修改菜品*/

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品信息
        dishMapper.update(dish);

        //删除原有的口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味
        //向口味表插入数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size()!=0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());

            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);

        }

    }

    /*
     * 根据分类id查菜品
     * */
    @Override
    public List<Dish> list(long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        List<Dish> list=dishMapper.list(dish);

        return list;
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    /*
    * 菜品起售停售
    * */
    @Override
    public void startOrStop(Integer status, Long id) {
        //停售菜品时,判断是否有套餐关联是起售状态,是的话提示"套餐起售中,无法停售菜品"
        if(status==StatusConstant.DISABLE){
           List<Setmeal> setmealList=setmealDishMapper.getByDishId(id);
           if(setmealList!=null&&setmealList.size()>0){
               setmealList.forEach(setmeal -> {
                   if(setmeal.getStatus()==StatusConstant.ENABLE){

                       throw new SetmealEnableFailedException("套餐起售中,无法停售菜品");
                   }

               });

           }


        }

        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);


    }
}
